1. Which do scientists study to determine air temperature at the time it was formed? Select the two correct answers. (1 point)
(Box) Fossilized pollen
(Box) air bubbles trapped in ice
(Box) tree rings
(Box) chemical isotopes in foraminifera shells
2, What can scientists learn from the chemical isotopes in leftover of foraminifera about the climate at the time the foraminifera lived? (1 point)
(Box) They can calculate the amount of rainfall.
(Box) They can calculate the amount of carbon dioxide in the air.
(Box) They can estimate the air temperature.
(Box) They can estimate the ocean's temperature.
3. What do Argo measure in the world's ocean currents? Select the two correct answers. (1 point)
Can you pick the pages that I need to find the answers? I can read through it again and see what I missed.
Can you pick two answers available? It will be a lot easier.
WEBSITE INFORMATION:
1st page -
Climate Change Tests -
Climate Change Tests Intro:
Hi again! I’ve been thinking a lot about how Earth’s climate is changing now and how it has changed in the past. That made me wonder—how are scientists able to tell that this process is happening now? My parents tell me that they see less snow pack in the mountains than they did when they were young, but I know scientists need much more evidence than that. I wonder what tools and strategies they use to determine how the climate has changed throughout Earth’s history.
2nd page -
Objective -
Warmer and Warmer:
“It’s really hot!” That is a popular cry of kids claiming their need for ice cream in the summer months. Kids are right. The planet is getting warmer and warmer. Five of the hottest years on record have happened since 2010. Starting in the late nineteenth century, when the Industrial Revolution swung into full force, Earth’s average surface temperature has risen about 0.9°C (1.62°F). Global warming is definitely happening.
What is the definition of global warming ?
A) the ability of greenhouse gases to trap heat in Earth’s atmosphere
B) the gradual increase in the overall temperature of Earth’s atmosphere
C) the natural changes in the temperature of Earth’s atmosphere between the seasons
Answer: B
| In this section, you will identify scientific tests and tools used to measure climate changes throughout Earth’s history. |
3rd page -
Measuring Climate Change:
Measuring climate change is much more complicated than just measuring increasing air temperatures. Scientists use many different scientific tools and tests to measure how Earth’s climate has changed throughout history. There are several measurements scientists use to study climate change:
carbon dioxide levels
air temperature
the amount of sea ice at the poles
ocean temperatures
sea levels
glacier size
What is the definition of climate change ?
A) the difference in average temperatures in a place from year to year
B) the steady increase in the amount of greenhouse gases in the atmosphere
C) the long-term change of temperature and normal weather patterns in a place
Answer: C
4th page -
Measuring the Past:
Scientists know what climate conditions thousands of years ago were like. Things such as tree rings hold information about past climates. A tree’s rings grow wider in warm, wet weather, and they stay thinner in cold, dry weather. Studying the size of the rings, therefore, gives scientists information about rainfall and temperature at the time each ring was formed.
(PICTURE)
Watch the video to learn about what scientists can learn from studying tree rings, ice, leftover shells of foraminifera, and fossilized pollen.
(VIDEO)
Measuring Climate Change Transcript:
NARRATOR: Want to know how hot it was last week? Or what the coldest temperature was a few years ago? Not a problem, you can just look it up!
An image of a temperature gauge is followed by an image of a weather app on a smart phone.
NARRATOR: But what about the weather from a million years ago? Why does it even matter? Scientists use temperatures from previous millennia to study the patterns and impacts of climate change over time.
Two images are shown. The first shows a piece of ice breaking off an ice shelf. The second image is of scientists looking at different data on computers.
NARRATOR: So how do scientists learn about temperatures of earlier eras? One strategy commonly used is to analyze tree rings. Each ring indicates a year of growth, and provides information about the environmental conditions that were a part of the tree's growth, such as the amount of rainfall and the temperature at the time.
A cross section of a tree shows several rings radiating from the center outward. Some rings are darker and thicker than others, while some rings are closer together and others are farther apart.
NARRATOR: Scientists also look at ice formed thousands of years ago to determine the temperature and the amount of carbon dioxide in the atmosphere at the time. Atmospheric carbon dioxide is one of the main causes of global warming.
An image shows a close-up view of ice.
NARRATOR: Scientists can even look at the leftover shells of small animals like foraminifera. The percentage of chemical isotopes found in these shells allows scientists to estimate the ocean's temperature millions of years ago when the animals lived.
A microscopic view shows a foraminifera. It looks like a shell made up of four round chambers.
NARRATOR: Fossilized pollen grains can also contribute to the record since knowing what kind of plants grew at a particular time indicates what the climate was like.
A microscopic view shows pollen grains that vary in size, shape, and texture.
NARRATOR: Climate change is a known phenomenon, and understanding its history can tell a lot about how the climate is changing and how it might change in the future.
A view from outer space shows the sun just beyond Earth.
5th page -
Measuring the Present:
Scientists are currently measuring climate change. Measurements, such as air and ocean temperature, snow cover, and sea level, give scientists data that describes how quickly and how much the climate is changing and that helps scientists make predictions about how it might change in the future.
Read about the tools scientists use to measure climate change today. As you read, answer the following question:
For what features of the planet are satellites used to study?
Measuring Climate Change Today:
(PAPER I CAN PRINT OUT)
(ANSWER)
What is the definition of salinity ?
A) the amount of salt dissolved in a body of water
B) the amount of freshwater in the ocean
C) the rate at which saltwater and freshwater mix
Answer: A
What is the definition of glacial retreat ?
A) the moving up of the end of a glacier so that it does not extend as far downvalley as it once did
B) the slow and steady movement forward of a glacier until it reaches the sea
C) the sheering away of mountainsides, soil, and rocks as a glacier forms
Answer: A
6th page -
Check for Understanding:
A little quiz
7th page -
Lesson Review:
Scientists sure do a lot of detective work to learn about Earth’s climate history and future! I’m not a fan of pollen because it makes me sneeze, but it’s cool that fossilized pollen provides so much information about historical climate change. I was interested to learn that rising global temperatures are one indicator of how the climate is changing, along with glacial retreat, decreasing snow cover, and rising sea levels. This leaves me wondering—now that we have evidence of what is going on, how can scientists and engineers help find ways to respond?
Now try restating the objective in your own words. Then summarize what you learned in this lesson. Compare your summary with the possible answer provided.
(SAMPLE SUMMARY)
How successful do you feel with this lesson?
Very successful. I understand the key ideas and interrelationships between concepts in alignment with the objective of the lesson. I am ready to move on to the next lesson.
Moderately successful. I understand most of the key ideas and concepts. My review of the sample summary helped me fill in small gaps. I am ready to move on to the next lesson.
Less successful. I didn't understand some key ideas or concepts, or interrelationships between concepts. I will review the lesson before moving on.
My answer: Less successful.
Your answers are as follows:
1) ice formed thousands of years ago and tree rings
2) Temperature and Salinity
3) They can estimate the ocean's temperature
Hope it helps!
Anonymous_Writer signing off ✌️
Earth science B Climate Change Unit 3 Lesson 3? ( 1) Ice formed thousands of years ago and tree rings ( 2 ) Temperature and Salinity ( 3 ) They can estimate the ocean's temperature.. 2/22/2022 %100
This didn't help rip
Okay. ~;=;~
I'll try..
I got my first answer by doing the check for understanding & wrote down all the definitions.
I got my second answer by realizing the definition for chemical istopes in foraminifera shells give evidence of ocean temperatures. So, I think it's that one.
I got my third answer for wanting to google what a Argo floats are which is a robot &
"Argo Floats are robots that float at different depths in the sea collecting information. They surface every 10 days and send their data about temperature and salinity to a satellite. An Argo Float is a steel float weighing about 25kg, with instruments inside."
I saw thinking the answer was temperature & salinity, idk if their right.
It's not chemical isotopes in foraminifera shells but i got everything else right OOF
Thanks :3
My best guess is tree rings bc you can tell how old a tree is by counting its rings so the more rings it has the longer it has been alive and survived so that shows scientist that the atmosphere must have been good for it to live as long as it has.
cat thanks, worked for me too
Okay, I did a little study.
1. Which do scientists study to determine air temperature at the time it was formed? Select the two correct answers. (1 point)
My answer: tree rings & chemical isotopes in formainifera shells
2. What can scientists learn from the chemical isotopes in leftover shells of foraminifera about the climate at the time the foraminifera lived? (1 point)
My answer: They can estimate the ocean's temperature.
3. What do Argo floats measure in the world's ocean currents? Select the two correct answers. (1 point)
My answers: temperature & salinity